Article
Materials Science, Multidisciplinary
Ary Anggara Wibowo, Mike Tebyetekerwa, Anh Dinh Bui, Thien N. Truong, Sandra Saji, Felipe Kremer, Zhongshu Yang, Zongyou Yin, Yuerui Lu, Daniel Macdonald, Hieu T. Nguyen
Summary: In this study, a method for growing large-area, high-quality MoSe2 monolayers and MoSe2-WSe2/WSe2-MoSe2 lateral heterostructures using molten salt-based chemical vapor deposition (CVD) is reported. The effects of different catalysts on the growth and optoelectronic quality of the materials are investigated, and it is found that molten salt catalysts support high-quality growth of MoSe2 monolayers and WSe2-MoSe2 lateral heterostructures.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Multidisciplinary
Shaohua Li, Decai Ouyang, Na Zhang, Yi Zhang, Akshay Murthy, Yuan Li, Shiyuan Liu, Tianyou Zhai
Summary: This review focuses on the use of substrate engineering strategies for the controlled growth of large-scale 2D transition metal dichalcogenides (TMDs). It provides insights into the interaction between TMDs and substrates and summarizes the effects of various substrate engineering approaches on the growth of 2D TMDs. The review also discusses the opportunities and challenges of substrate engineering for the future development of 2D TMDs.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Abid, Poonam Sehrawat, Christian M. Julien, Saikh S. Islam
Summary: The challenge of growing monolayer WS2 of domain size beyond a few microns continues to exist, but a new method using chemical vapor deposition on graphene-oxide has shown success in creating centimeter-sized WS2 films. The joining of carbon nanostructures in GO to RGO is key in expanding domain size, along with the surface roughness of the film. This study may lead to new possibilities in growing large area WS2 films for device applications.
Review
Chemistry, Physical
Bijun Tang, Bingyu Che, Manzhang Xu, Zhi Peng Ang, Jun Di, Hong-Jun Gao, Haitao Yang, Jiadong Zhou, Zheng Liu
Summary: This review highlights recent developments in twisted 2D transition metal dichalcogenides (TMDs), focusing on synthesis strategies, characterization techniques, physical properties, and future research directions. Researchers explore the preparation of twisted TMD bilayers and investigate their unique properties using various spectroscopic techniques, shedding light on interlayer excitons and correlated electronic phases. Challenges and potential research areas are also briefly discussed in the context of recent advancements.
Article
Chemistry, Multidisciplinary
Ziyu Luo, Weihao Zheng, Nannan Luo, Bo Liu, Biyuan Zheng, Xing Yang, Delang Liang, Junyu Qu, Huawei Liu, Ying Chen, Ying Jiang, Shula Chen, Xiaolong Zou, Anlian Pan
Summary: WS2 monolayers grown by physical vapor deposition method exhibit an intriguing lightening of photoluminescence from the edge to the interior over time, eventually brightening the entire monolayer. The photoluminescence enhancement is found to be induced by p doping from oxygen adsorption, with the dissociation of chemisorbed oxygen molecules playing a significant role. The rate of photoluminescence brightening can be further manipulated by controlling the oxygen concentration and temperature.
Article
Nanoscience & Nanotechnology
Xi Yang, Zhihong Zhu, Fang Luo, Guang Wang, Gang Peng, Mengjian Zhu, Shiqiao Qin
Summary: Researchers successfully synthesized monolayer hexagonal-shaped WS2 using physical vapor deposition strategy, revealing differences in photoluminescence intensity under different edge structures due to varied strain distributions from S-terminated and W-terminated regions. Through the comprehensive application of multiple tools, the details of the photoluminescence segmentation mechanism were revealed, confirming the physical mechanism.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Jidong Huang, Yan Tian, Yong Cheng, Xingxing Li, Siyu Zhang, Ji Jiang, Jingren Chen, Gaokai Wang, Jingzhen Li, Zhigang Yin, Xingwang Zhang
Summary: In this study, a facile single-step chemical vapor deposition method was used to grow large-area uniform ZrS2(1-x)Se2x alloy films on sapphire substrates, with fully tunable composition. The alloys exhibited good single crystallinity, epitaxial quality, and uniform elemental distribution. The bandgap of the ZrS2(1-x)Se2x alloy could be continuously tuned from 1.86 to 1.15 eV, depending on the Se composition. ZrS2(1-x)Se2x-based photodetectors showed a sensitive photoresponse to visible light with a fast response time of about 100 μs.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qilong Cui, Ziyu Luo, Qirui Cui, Wen Zhu, Hongwei Shou, Chuanqiang Wu, Zhanfeng Liu, Yunxiang Lin, Pengjun Zhang, Shiqiang Wei, Hongxin Yang, Shuangming Chen, Anlian Pan, Li Song
Summary: An in situ defect engineering strategy was reported to reduce the impact of intrinsic sulfur vacancy on tungsten disulfide (WS2) monolayer, resulting in oxygen doped WS2 monolayer with significantly improved optical properties and high PLQY which surpasses mechanically exfoliated counterparts. The method also provides materials with superior environment stability, with the high PLQY lasting up to 3 months under ambient conditions. Insights from first-principle calculations indicate that the enhancement mechanism involves the suppression of nonradiative recombination and conversion from trion to neutral, with excellent stability attributed to repaired saturated coordination bonds at sulfur vacancy sites.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yahuan Huan, Tiantian Luo, Xiaocang Han, Jun Ge, Fangfang Cui, Lijie Zhu, Jingyi Hu, Feipeng Zheng, Xiaoxu Zhao, Lili Wang, Jian Wang, Yanfeng Zhang
Summary: This study reports the composition-controllable synthesis of 2D non-layered iron selenide nanosheets and explores their fundamental properties as self-intercalation induced novel TMDs compounds, providing a new direction for their application explorations in nanoelectronics and spintronics-related fields.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Riccardo Torsi, Kyle T. Munson, Rahul Pendurthi, Esteban Marques, Benoit Van Troeye, Lysander Huberich, Bruno Schuler, Maxwell Feidler, Ke Wang, Geoffrey Pourtois, Saptarshi Das, John B. Asbury, Yu-Chuan Lin, Joshua A. Robinson
Summary: In this work, we successfully demonstrate substitutional rhenium (Re) doping of MoS2 monolayers with controllable concentrations down to 500 ppm by metal-organic chemical vapor deposition (MOCVD). We find that even trace amounts of Re can significantly reduce sulfur site defect density and suppress defect photoluminescence (PL) commonly seen in undoped MOCVD MoS2. Moreover, Re-MoS2 transistors exhibit improved carrier transport and device performance compared to undoped MoS2.
Article
Chemistry, Multidisciplinary
Yiwei Zhang, Peng Zhang, Tengfei Xu, Xingguo Wang, Huaning Jiang, Yongji Gong
Summary: Researchers reported a controllable synthesis method for ultrathin two-dimensional TMDCs nanosheets and found that H2S played an important role in controlling their morphology. With the assistance of H2S, the growth of MS2 exhibited thinner thickness and lower nucleation density, which was beneficial for device applications.
CHINESE CHEMICAL LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Larionette P. L. Mawlong, Anh Tuan Hoang, Jyothi Chintalapalli, Seunghyeon Ji, Kihyun Lee, Kwanpyo Kim, Jong-Hyun Ahn
Summary: This study introduces a new method for synthesizing large-area, high-quality two-dimensional transition metal dichalcogenides, such as MoS2. The method improves the performance of photodetectors and reduces sulfur vacancy defects in the film, which significantly affects material quality.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Tae Soo Kim, Krishna P. Dhakal, Eunpyo Park, Gichang Noh, Hyun-Jun Chai, Youngbum Kim, Saeyoung Oh, Minsoo Kang, Jeongwon Park, Jaewoo Kim, Suhyun Kim, Hu Young Jeong, Sunghwan Bang, Joon Young Kwak, Jeongyong Kim, Kibum Kang
Summary: The gas-phase alkali metal-assisted metal-organic chemical vapor deposition (GAA-MOCVD) method is reported for the growth of 2D transition metal dichalcogenides (TMDCs). This method can be applied to various TMDCs and produce large-scale continuous films. The combination of oxygen and sodium propionate (SP) increases the grain size of MoS2 and enhances nucleation suppression in the GAA-MOCVD process.
Article
Materials Science, Multidisciplinary
William R. Campbell, Francesco Reale, Ravi Sundaram, Simon J. Bending
Summary: This study developed a process for large-scale growth of monolayer WS2 using tungsten hexachloride as a precursor. It was found that post-growth H2S annealing significantly improved the optical quality of the films. The WS2 films were successfully transferred to other substrates without degradation in quality.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ting Kang, Zijing Jin, Xu Han, Yong Liu, Jiawen You, Hoilun Wong, Hongwei Liu, Jie Pan, Zhenjing Liu, Tsz Wing Tang, Kenan Zhang, Jun Wang, Junting Yu, Dong Li, Anlian Pan, Ding Pan, Jiannong Wang, Yuan Liu, Zhengtang Luo
Summary: In this work, the band alignment of vertically stacked monolayer semiconducting transition metal dichalcogenides (TMDs) was effectively tuned using the chemical vapor deposition (CVD) method. By changing the alloy composition and twist angles, a continuously tunable band alignment and transition of different types of band alignment were achieved. The results showed that moderate twist angles significantly enhanced the photoluminescence, and the heterojunction device exhibited high photoresponsivity, large detectivity, and high external quantum efficiency.
Article
Chemistry, Multidisciplinary
Shaul Katznelson, Bar Cohn, Shmuel Sufrin, Tomer Amit, Subhrajit Mukherjee, Vladimir Kleiner, Pranab Mohapatra, Avinash Patsha, Ariel Ismach, Sivan Refaely-Abramson, Erez Hasman, Elad Koren
Summary: This study demonstrates the wavelength multiplexing of two primary excitonic channels in 2D semiconductors mediated by dark excitons. The polarization of an out-of-plane electric field is encoded into wavelength information. Furthermore, the impact of thermal scattering on exciton multiplexing is investigated through temperature-dependent photoluminescence measurements. The findings suggest that excitonic transitions can be manipulated through field polarization, leading to potential advancements in photonic device architectures.
MATERIALS HORIZONS
(2022)
Article
Chemistry, Multidisciplinary
M. B. Sreedhara, Yana Miroshnikov, Kai Zheng, Lothar Houben, Simon Hettler, Raul Arenal, Iddo Pinkas, Sudarson S. Sinha, Ivano E. Castelli, Reshef Tenne
Summary: Nanotubes of transition metal dichalcogenides offer unique properties and potential applications. Replacing sulfur by selenium can yield ternary nanotubes with strong modulation in absorption edge. Solid oxide nanowhiskers were used as a sacrificial template to obtain high yield nanotubes. The nanotubes showed modulated lattice structure and chemical composition, exhibiting strong light-matter interactions and non-linear optical properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Sujit Kumar, Lothar Houben, Katya Rechav, David Cahen
Summary: This research demonstrates the formation of 2D materials on 3D metal halide perovskites using low electron-fluence scanning transmission electron microscopy. It provides insights into the dynamics of the heterointerface and its implications for the stability of 2D-on-3D composites. The findings also have implications for the engineering and enhancement of stability in these systems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Multidisciplinary
Avinash Patsha, Kamalakannan Ranganathan, Miri Kazes, Dan Oron, Ariel Ismach
Summary: This study demonstrates controlled self-seeded growth of monolayer transition metal dichalcogenide crystals and their lateral heterostructures through modifications in the nucleation and growth steps. It also shows the epitaxial growth of monolayer TMDCs using halide chemical vapor deposition approach, achieved by reducing the self-seeded growth and modifying the nucleation step. The research findings reveal high optical and electronic quality of the grown 2D TMDCs semiconducting crystals and their promising potential for large-scale device applications.
APPLIED MATERIALS TODAY
(2022)
Article
Nanoscience & Nanotechnology
Sujit Kumar, Vinayaka H. Damle, Tatyana Bendikov, Anat Itzhak, Michael Elbaum, Katya Rechav, Lothar Houben, Yaakov Tischler, David Cahen
Summary: Two-dimensional (2D) halide perovskite films can protect three-dimensional (3D) perovskite surfaces from exposure and enhance the efficiency of photovoltaic cells. In this study, we investigate the growth of ultrathin 2D films through vapor-phase cation exchange and real-time in situ monitoring. The results show that the thinnest 2D cover we can grow is <5 nm, with improved self-repair capability and protection against environmental degradation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Assael Cohen, Pranab K. Mohapatra, Simon Hettler, Avinash Patsha, K. V. L. V. Narayanachari, Pini Shekhter, John Cavin, James M. Rondinelli, Michael Bedzyk, Oswaldo Dieguez, Raul Arenal, Ariel Ismach
Summary: Conventional epitaxy is essential for semiconductor technology, but there are still unresolved differences in terms of orientation registry and interface chemistry in quasi-vdW epitaxy. This study focuses on the growth of WS2 using metal-organic chemical vapor deposition (MOCVD) and a metal-seeding approach, which allows for the formation of a continuous WO3 layer on a sapphire substrate. The presence of this interfacial layer strongly influences the subsequent growth of the WS2 layer. This work provides insights into the epitaxial growth mechanism and demonstrates the effectiveness of the metal-seeding approach for the growth of other TMDC layers.
Article
Chemistry, Physical
Kexiu Rong, Xiaoyang Duan, Bo Wang, Dror Reichenberg, Assael Cohen, Chieh-li Liu, Pranab K. Mohapatra, Avinash Patsha, Vladi Gorovoy, Subhrajit Mukherjee, Vladimir Kleiner, Ariel Ismach, Elad Koren, Erez Hasman
Summary: The authors introduce a spin-optical laser based on a monolayer transition metal dichalcogenide coupled to a heterostructure microcavity supporting high-Q spin-valley resonances originating from photonic Rashba-type spin splitting of a bound state in the continuum. The Rashba monolayer laser exhibits intrinsic spin polarizations, high spatial and temporal coherence, and inherent symmetry-enabled robustness features, allowing for valley coherence in the WS2 monolayer under arbitrary pump polarizations at room temperature. Our monolayer-integrated spin-valley microcavities pave the way for further exploration of classical and non-classical coherent spin-optical light sources involving both electron and photon spins.
Article
Chemistry, Physical
Dyuti Bandyopadhyay, Sirshendu Ghosh, Lothar Houben, Ronen Bar-Ziv, Maya Bar-Sadan
Summary: Bimetallic phosphides produced by a colloidal chemistry method exhibit enhanced catalytic activity for the hydrogen and oxygen evolution reactions, enabling them to effectively catalyze the full water-splitting reaction.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Dana Cohen, Lothar Houben, Andrea Galisova, Yishay Feldman, Sthephen Fox, Inbal E. Biton, Amnon Bar-Shir
Summary: This study developed ultrasmall, water-dispersed barium fluoride nanocrystals for bioimaging applications. By doping the nanocrystals with lanthanides, the morphology and F-19-MRI properties could be controlled. These nanocrystals, called LaSamBa, exhibited a single F-19-NMR signal and high atomic number of barium atoms, making them suitable for both F-19-MRI and CT imaging.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Angelica Niazov-Elkan, Margarita Shepelenko, Lotem Alus, Miri Kazes, Lothar Houben, Katya Rechav, Gregory Leitus, Anna Kossoy, Yishay Feldman, Leeor Kronik, Peter G. Vekilov, Dan Oron
Summary: A facile procedure is presented to deposit bio-inspired birefringent crystals of xanthine derivatives on a template of single-crystal quartz. The crystal sheets obtained have well-defined orientation and high optical anisotropy, and can be used to fabricate polarization-dependent optical devices.
ADVANCED MATERIALS
(2023)
